Abnormal bleeding or hemorrhage within a joint cavity.
From Greek 'arthron' (joint) + 'rhegnynai' (to burst/break forth), a medical term coined in the 19th century to describe the sudden rupture of blood vessels inside joints.
Medieval and Renaissance doctors loved combining Greek roots to name diseases they observed but didn't understand—this word literally means 'joint bursting forth,' capturing both the visual image and the frightening symptom patients experienced.
Complete word intelligence in one call. Free tier — 50 lookups/day.